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Recently, the low utilization of spectrum has become a serious problem for the next generation of the high-speed wireless communication. A general framework named spectrally modulated, spectrally encoded (SMSE) has been proposed to solve this problem. But it cannot generate the waveform which is suitable for multi-antenna systems. Therefore, in this paper, we impose spatial information into SMSE framework...
Setting up a communication system should also pay attention to both security and concealment in addition to the validity and reliability of the information, especially in military communication. In this paper, we introduce an application of the SD-SMSE framework under the secret communication, and the application combines overlay and underlay access with encryption. At the receiving end, we use the...
Forest is an important component of terrestrial ecosystems, so it is necessary to estimate the forest aboveground biomass (AGB) accurately in order to reduce the uncertainty of the carbon stock in forest ecosystem. In this study, a fast, efficient and automatic method has been proposed, called as Automatic KNN(AKNN). Using the Landsat 8 OLI data, airborne polmetric SAR (PolSAR) data, the AKNN has...
An approach was used to incorporate the forest carbon flux for Qilian Mountains by ecological-process-based model (Biome-BGC), and remote-sensing-based model (MODIS-PSN). The calibration phase, aiming at setting the ecophysiological parameters to effectively simulate the daily GPP behavior of the Qilian Mountains, was proceeded by adjusting the 8 day GPP outputs obtained from Biome-BGC using the optimized...
Forest biomass reflects the ecological succession and human disturbance of the forest, and can fully embody the quality of forest ecosystem environment. The Qilian Mountain forest reserve at upper reaches of the Heihe River Basin was selected for the study. Landsat Thematic Mapper 5 (TM) images were selected as the source data, which were rectified by SCS + C terrain radiometric correction. Forest...
Consumption, as an important factor to influence income and economic growth, is a research focus of many economists and scholars. Based on Keynes's absolute in-come hypothesis, this paper, with the help of Eviews6.0 software, constructs a consumption model between per capita traffic-communications consumption and per capita disposable income of the urban and the rural residents in China and a model...
The effect of retrogression re-aging on the mechanical properties, electrical conductivity and the microstructure of AA7085 has been investigated. Transmission electron microscope was used to analyze the microstructures. Through the investigation of the effect of the retrogression time on the properties and microstructure of AA7050, the optimized retrogression time was confirmed. After pre-aging at...
In this paper, a new adaptive vector filtering method with low computational complexity for image sensor applications is presented. The alternation between the ASDDF and the AVMF in the dependence on the order-statistics theory reduces the computational complexity. In addition, the proposed method provides excellent detection of noisy pixels and removes both chromatic and achromatic noisy pixels.
Singular rough sets is defined by R-element equivalence class, which has dynamic characteristic. By engrafting, crossing, and penetrating between information security theory and singular rough sets, singular rough decision is given, furthermore secure transmission of decision conclusion is also presented in this paper. The fusion and share between singular rough sets and information security theory...
With the increasing demand for the development of high quality remote sensing image techniques, the problem of image degradation causing by pixel-response non-uniformity (PRNU) is becoming a key issue. In this paper, a novel PRNU correction algorithm is proposed and implemented on FPGA hardware platform. Firstly, the characteristic of the CCD noise is analyzed. Secondly, the degradation model of pixel-response...
The involute spline made by cold-rolling have many advantages. This method can increase the production efficiency, save material, prolong the cutting tool's life, and improve the dimensional accuracy. Because the metal fiber continues between the spline's teeth, wearing resistance of the spline's teeth side is better and intensity of the teeth is higher. The cold rolling is the development trend of...
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